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30 Οκτ 2023 · Learn about the accessory nerve (CN XI), which has both spinal and cranial roots and innervates muscles of the neck and pharynx. Find out its course, nuclei, examination, and lesions.
17 Ιουλ 2023 · The accessory nerve is a mixed nerve that has both cranial and spinal roots. It controls muscles in the neck, shoulder, and throat, and has many anatomical variations. Learn about its structure, function, and associated conditions.
12 Οκτ 2023 · Motor Function. The spinal accessory nerve innervates two muscles – the sternocleidomastoid and trapezius. Sternocleidomastoid . Attachments – Runs from the mastoid process of the temporal bone to the manubrium (sternal head) and the medial third of the clavicle (clavicular head).
17 Ιουλ 2023 · The accessory spinal nerve or XI cranial nerve is essential for neck and shoulder movement, the intrinsic musculature of the larynx, and the sensitive afferences of the trapezius and sternocleidomastoid musculature.
The spinal accessory nerve is notable for being the only cranial nerve to both enter and exit the skull. This is due to it being unique among the cranial nerves in having neurons in the spinal cord. [9] After leaving the skull, the cranial component detaches from the spinal component.
The spinal accessory nerve, considered part of the eleventh cranial nerve, provides motor innervation to sternocleidomastoid and trapezius. A comprehensive literature review and two cadaveric dissections were undertaken. The spinal accessory nerve originates from the spinal accessory nucleus.
24 Ιαν 2018 · The spinal accessory nerve provides motor function to the sternocleidomastoid muscle, which extends the neck and the trapezius, as well as the upper back and shoulder. Dysfunction of...
